METERING WITH ECOGEAR PUMP
When a plant engineer is required to select and specify a chemical metering pump, the decision is often regarded as a simple choice between a reciprocating plunger pump or a diaphragm pump and gear pumps are seldom even considered. This understanding has evolved over the years until the terms metering and reciprocating pump have nearly become synonymous. Conventional Metering Pumps, whether reciprocating plunger or diaphragm (disk or tubular shape), operate on the same common principle. The volume of the pumping chamber is altered by the reciprocating action, which changes the pressure exerted on the fluid being pumped. The pumping action is controlled by a pair of unidirectional check valves, Figure 1.